html {
    height: 100%;
    position: relative;
}
body{
    max-width: 500px;
    margin: 0 auto;
}
body, .mainBox, .main {
    position: relative;
    height: 100%;
    overflow-x: hidden;
}

.specialBox{
    border: 1px solid #E1E1E6;
    background: #EFEFF4;
    padding: 0 20px;
    box-sizing: border-box;
    height: 30px;
    line-height: 30px;
    overflow: hidden;
    border-radius: 4px;
}
.special{
    font-size: 14px;
    width: 100%;
    border: 0;
    line-height: 30px;
    background: #EFEFF4;
}
.btn{
    width: 60%;
    margin-top: 10px;
}
.btnSub{
    letter-spacing: 2px;
}
